Who owns MAC prefix 500B911?

500B911 is registered to SPD Development Company Ltd in the IEEE MA-M registry.

What devices use 500B911?

Any network device with a MAC address starting 50:0B:91:1 was manufactured by or for SPD Development Company Ltd.

MA-M · OUI prefix

SPD Development Company Ltd

Any MAC address starting 50:0B:91:1 is registered to SPD Development Company Ltd.

OUI prefix	500B911
Vendor	SPD Development Company Ltd
Registry	MA-M (28-bit, medium block)
Example MAC	50:0B:91:1:00:00:00

What this means

The IEEE assigned the MA-M block 500B911 to SPD Development Company Ltd. Every network interface they manufacture under this block has a MAC address beginning with these digits, followed by a unique per-device identifier. If a device on your network shows a MAC starting 50:0B:91:1, it is SPD Development Company Ltd hardware.

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